Improvement in supplying liquid fuels to furnaces



' a sneensf-sneeti J. ROGERS. Supplying Liquid Fuel `to Furnaces..- No.217,154". Patented Ju|y1,1879.

` 3 Sheets-Shen; 2. J. RGGERS.

Supplying Liquidy Fuel tlol'Furrgaoes. No. 217,154. KPatented-1u|y1,1879.

N. PETERS. FHOTO-LTHOGAPHER, WASHINGTON, D. G.

- 3 Shets-Sheet 3. J. ROGERS.

Supplying Liqu-dfuel to Furaces.. Y No. 217,154. 1 Patented July 1,1879.

Q@ :gli-U9 ID L gil-IMI- fF'EfERS, FHD'TO;LITNQQRAPNERY WASHINGTON. D.C.

lof Ollio, have invented certain new and useful t Liquid or Semi-LiquidFuels to Furnaces for p j ector is rendered more certain th anheretofore,

l the inner and outer tubes; also, in the combi- UE'TTEE STATES PATENTGEErcE AJOHN ROGERS, OF COLUMBUS, OHIO,

ASSIGNOR, BY MESNE ASSIGNMENT,

TO AMERICAN LIQUID FUEL COMPANY, OF NEW YORK, N. Y.

IMPROVEMENT IN SUPPLYING LIQUID FUELS To FURNACES.

Specification forming part of Letters Patent No. 217,154, dated July l,1879; application iiled January 20, 1879.

To all whom it inaycmwem! Be it known that I, JonN ROGERS, of Golumbus,in the count-y of Franklin and State Improvements in Apparatus forSupplying heating them, of which the following is a speciflcation.

My invention relates to improvements in apparatus for supplying andburning suitable hydrocarbon fuels for heating furnaces for boilers, formanufacturing iron, for making glass, Ste. Goal-tar, gas-tar, or anyother suitable liquid or semi-liquid fuel may be employed.

To more particularly designate my inven-` tion, it may be stated to be,in some of its leading features or in general respects, similar1 to orto belong to the same class as certain. inventions shown and describedin Letters Patent of the United States heretofore granted to Silas C.Salisbury.

My objects, generally, are to improve and perfect apparatus forsupplying` and burning hydrocarbons, and especially to provide means bywhich a proper feed or supply of the fuel to the furnace origniting-chamber by an inby which the injector may be prevented fromclogging, or be cleared in event of clogging or partial obstruction bythe bakingor hardening of the fuel, or by any foreign substance, and bywhich to clear out the fuel-supply tube.

My improvements, as will hereinafter specifically be designated by theclaims, consist in the combination, with an injector having an inner andan outer tube, forming concentric fuel and steam passages, of a plunger'or reciprocating clearing-rod working in the injector and through thejet nozzles or ports of both nation, with the injector and theclearing-rod working endwise in the central tube thereof, of a handle orlever for working said clearingrod without interfering with theconnections by which steam and fuel are supplied to the injector, also,in the combination of the injector having the steam and fuel passages,the clearing-rod supported bythe shank or extension of one of theinjector-tubes, a fuel-feed pipe connecting with the injector, and asteam-pipe connecting with the shank of the injector-tube in which theclearing-rod works, and in advance of the handle by which said rod isoperated, also, in the combination of the'injector having fuel and steamtubes or passages, a

fuel -feed pipe connected with said fuel-passage, a pipe for supplyingsuperheated steam to the injector steam-passage, a pipe for supplyinglive steam to the injector fuel-passage, and cocks in the fuel-feedpipe, superheatedsteam pipe, and live-steam pipe, whereby the Y fuel andthe superheated steam may be admitted to the injector-passages, oreither or both be shut off, and live steam may be admitted to theinjector fuel-passage when the fuel-supply is stopped, to clearit andits jet opening or nozzle; also, in the combination of the injectorhaving the inner and outer tubes, forming the concentric passages orchambers for steam and fuel, a fuel-feed pipe connecting with thefuel-chainber of the injector, a steam-pipe connecting with thesteam-chamber for supplying superheated steam thereto, a steam-pipe forlive steam, also communicating with said steamchamber, and a series ofcocks in the pipes by which to regulate or shut off the supply of fueland steam and to direct either the live steam or the superheated steamto the injector at will, whereby the superheated steam may be used inconnection with the hydrocarbon fuel, and both nozzles of the injectormay be cleared out by the live steam admitted to the steampassage eitherwhen the superheated steam'is being supplied or is cut off; also, in thecombination of the injector having the inner and outer tubes orconcentric steam and fuel passages, a fuel-feed pipe connected with saidfuel-passage, a pipe for supplying superheated steam connected with theinjector steam-tube or inner passage, a pipe for supplying live steamconnected both with the fuel-feed pipe and the superheated-steam pipe,and a series of cocks in the several pipes and their connections bywhich to regulate and shut off the supply to the injector of the fuel,superheated steam, and live steam, and admit of directing the live steameither to the steam-passage or to the fuel-passage of the injector bythe superheated-steam pipe and the fuel-feed pipe respectively, whereby,when the fuel has clogged or become baked in the injector by the intenseheat of the superheated steam, it may be softenedand entirely removed bydirecting the live steam first to one passage and then to the otherpassage oft-he injector, or to both passages at the same time, so as notonly to clear the fuel-passage, but also clean ont thoroughly both jetopenings or nozzles; also, inthe combination of a fuel reservoir orpipe, a steampipe passing therethrough to warm the fuel, a feed-pipeleading from said reservoir to supply the injector with fuel, aconnecting steam-pipe communicating with the reservoir steam-pipe andfuel-feed pipe, and cocks in said pipes by which to cause the steam topass from thereservoir steam-pipe to the fuel-feed pipe to clear it orto soften the fuel 5 also, in the combination of the fuel-reservoir, thefuel-feed pipe leadingA therefrom to the injector, the steampipe in thereservoir, its connecting steam-pipe leading to the fuel-feed pipe, thesuperheatedsteam pipe connecting with the injector steampassage, theconnecting-pipe between the superheated-steam pipe and steam-pipeleading from the reservoir steam-pipe to the fuel-feed pipe, and cocksin the several pipes by which to shut off the superheated steam ordirect it to the injector or to the live-steam pipe, and by it to thefuel-feed pipe or to the fuel-reservoir, and also to admit of shuttingolf the supply of live steam from the reservoir steampipe, or to directit to the fuel-feed pipe, and by it either to the fuel-reservoir or tothe injector, and also allow of the live steam being now known to me ofembodying my improvements in apparatus suitable for carrying out orpracticing my invention, Figure l is an elevation of the injector andits immediate connections; Fig. 2, a horizontal central section throughthe injector, showing its internal construction and the points ofconnection with it 4ofafuel-supplypipe and a superheated-steam pipe.Figs. 3 and 4 are views, partly in elevation and partly in verticalsection, of the complete apparatus, alike in all respects eX- cept'thatin the former cold air is admitted to the furnace with the eommingledfuel and steam, while in the latter hot air is supplied.

In this instance the apparatus is especially designed for burninggas-tar, which is supplied to a tank or reservoir, shown as consistingof a large suitably-located pipe, A, having a fuelfeed pipe, B, passingout from its bottom. There is a feed-pipe, B, for every furnace.

A steam-pipe, C, for heating the fuel-passes longitudinally andcentrally along the reservoir-pipeA, and takes its steam from anysuitable source. This pipe C should pass out at one end of the reservoirand be provided with a blow-off cock, and should also have a cock toregulate the admission ot' steam. One ot' the objects of providing thispipe is to enable the fuel to be readily warmed to a sufficient degreeto reduce it to a fluid or semi-fluid condition, so as to ilow by way ofthe feed-pipe B.

A steam-pipe, D, one for every fuel-feed pipe, connects withthereservoir steam-pipe C at one end, and at the opposite end isconnected with the feed-pipe at a suitable point, as at b, between twococks, e ed, of the feed-pipe, for a purpose hereinafter to beexplained. Acock, d, is provided in the vertical portion of theconnecting steam-pipe D, so that the live steam from the reservoir-pipe(l may be admitted to or shut off from the fuel-pipe.

A pipe, E, for superheated steam, taken from a coil of pipes heated insuitable manner, designed to be arranged in the furnace E', in thisinstance communicates with an injector, presently to be described, andis provided with a cock, F', above the injector and with a blowoff cockor exhaust-nozzle, F.

A connecting-pipe, G, between the superheated-steam-pipe E andlive-steam pipe D, and the cocks c, g, and d enable the attendant todirect the superheated steam to the fuelsupply pipe B or to the injectorat will, or even to cause the superheated steam, or apart of it, to passto the reservoir steam-pipeO, should there be any interruption of theusual supply of live steam to the pipe C. In some cases it may be foundadvisable to use the superheated steam in the pipe G.

It will be understood that there is a pipe, E, and, when used, aconnection, G, and suitable cocks for ever T pipe D and B.

The injector H for every fuel-feed pipe B is made in adjustably-conne'eted sections, and of an inner tube, chamber, orsteam-passage, 7L, anda surrounding or concentric outer tube having thefuel chamber or passage h', to the bottom of which the end of thefuel-supply pipe B leads. The superheated-steam pipe E communicates withthe steam-passage or inner tube, h, of the injector by a box orcoupling, l, adjustably connected with the shank, extension, or rear endof this tube h. A stuffingboX, J, .is fitted to the coupling-box I,andthrough it plays a clearing-rod orplunger, K, worked by any suitablehandle or lever. In this instance the plunger is jointed to a lever, L,provided with a handle at one end and linked at its opposite end to arest or arm, M, secured by a screw to the threaded end of the couplingI. The plunger or clearing-rod may kbe reciprocated endwise in thesteam-passage or inner tube, h, of the injector at any time to clear thejet-nozzles or perforated ends m and m of the injector. The small end lcof the plunger works through these nozzle-openings when the lever isproperly worked, and forcibly ejects any solid substance which may haveentered the openin gs.

Practice has demonstrated the utility of the plunger not only to removeany foreign clogging matter that may have by accident gotten jammed inthe nozzles m `or m, especially the latter, which is very liable to beclogged when used about metallurgie furnaces, but to clear away thefuel( gas-tar) when it becomes baked and clogs up the injector,fuel-chamber, or passage h and its nozzle m so firmly as to render itextremely difficult to entirely remove the obstruction by the pressureof the steam alone.

VIn operation, it is only` necessary to occasionally work the plunger toinsure the proper supply of the fuel and steam' to the furnace over theincandescent fuel on the grate N, or to indicate that the fucl-chamberin rear of the injector-nozzles is clogged. When so clogged steam isadmitted under pressure to the injector, as presently explained.-

An air-inlet funnel or supply-box, O, for cold air, as in Fig. 3, or for.hot air from any suitable source, as in Fig. et, supplies the air tosupport and insure combustion ofthe commingled superheated steam andfuel Vsprayed into the tire-chamberof the furnace by the injector, as

- is well understood.

In opera-tion, the fuel in the reservoir, havin g been sufficientlywarmed by the steam in pipe C, iiows to the injector and into thefurnace, the eocksa and a' in thefuelfeed pipeB andthe cocks F and e ofthe superheated-steam pipe being open, and the cock F of thesnperheatedsteam pipe, the cock gof the connecting-pipe G, and `thecockd of the steam-pipe D being closed. Should the fuel become clogged inthe fuelpassa-ge h of the injector, the cocks a and d, and also df, whenemployed, are all opened, and live steam admitted to the fuel-pipe B, towarm and force out the clogging matter in the fuelpassage of theinjector. If desired, superheated steam may be directed to thefuel-passage of the injector for the same purpose by properly adjustingthe cocks. By closing the cock a and opening the cock a in the feedpipeB, this pipe may be cleaned out between V the point at which the pipeDconnects with it and the reservoir, andthe steam may be allowed to passinto the reservoir to facilitate the softening of the fuel in starting.By the arrangement of pipes and cocks shown I am enabled, should itbecome necessary or expedient to do so, to admit ysteam directly to thecontents of the reservoir, and at the same time to heat at the centerbythe pipe C.

It will be seen also that live steam may be directed to the injectorsteam-passage by way of the pipes D, Gr andE by manipulating the cocksin the several pipes so as to clear the jet-nozzle on as well'as thenozzle m and the space between them at the same time. The live steamserves to soften the tar, which sometimes becomes baked by the intenseheat to which it is subjected by the superheated steam and furnace-fire.

Instead of employing the fuel-feed pipe B to conduct the steam to thefuel-chamber of thelinj ector during the intermission of the supthat aseparate steam-pipe--such, for instance,

as a branch pipe from the pipe E or the pipe -D-may be connected withsaid chamber, and

be provided with a cock or cocks to admit steam to the chamber to clearit. Ipreferthe construction shown, however. f

Obviously two, or even more, injectors and their adjuncts may beemployed-for a single furnace. When a large furnace is to beheate'd twoinjectors answer better than one. It will, of course, be understood thatall co-operating parts (steam-rapes, feed-pipes, air-boxes, &c.,) are.duplicated for every injectoradded, and properly connected with it.

I do not cla-im admitting the liqnid fuel together with superheatedsteam into the furnace in the form of spray. f

I claim as of my own invention- 1. The combination, with theinjector, ofthe plunger or clearing rod movable eudwise` thereiirand playing at itsend through the nozzles or jet-openings of both the inner and outertubesthereof, substantially as and for the purpose hereinbefore set forth.

2. rlhe combination of the injector-tubes, the plunger working intheinner tube. the lever to which the plunger is jointed, and the arm orrest supported on the shank or eXtension of the inner tube of theinjector in rear. of the fuel and steam pipe connections therewith, towhich arm the lever islinked, substantially as and for the purposehereinbefore set forth.

3. rIhe combination, substantially as hereinbefore set forth, of theinjector having the vliquid-feed passage and the steam-passage in itsouter and inner tubes, respectively, the clearing rod or plunger movableat its end through the tubenozzles or jet-openings, the fuel-pipecommunicating with the fuel-passage in the injector around the innertube thereof, and the steam-pipe communicating with the steam-passage inthe inner tube, through which the plunger works.

. 4. The combination of the injector havin the steam and fuel passagesin the inner and outer tubes thereof, and the nozzles or jetopenings inline with each other, the plunger, its lever, the arm or rest for saidlever, the coupling-box by which the arm is secured to the shank orextension of the inner tube of the injector, the superheated-steam pipeconnecting with said tube by way of said box, and the fuel-feed pipe,these members being and operating substantially as hereinbefore setforth.

5. The combination, substantially as hereinbefore set forth, of theinjector havingthe fuel and steam passages, the fuel-feed pipe connectedwith the injector fuel-passage, the pipe for supplying superheated steamto the injector steam passage, the pipe for supplying live steam, havingcommunication with the fuelpassage of the injector, and cocks in thedifferent pipes by which to admit the superheated steam and fuel totheir respective pas- Sages in the injector and admit of clearing outiof both the injector-:passages,es described.

Vthe iinjector by the live steam admitted 1to1-the l fuel-passage whenthe fsupjpl;r of fuel vis-cu'troiff, l as set forth.

6. The combination., substantially/:isrherein- 5 before set -forth, of:the injector fha-ving the passages for fuel-and steam, the fuel-feedpipe, the pipe for supplying` super-heated 'steamy-the fpipe forsupplyinglive steamendlhzwingfcom f munication withthe-stezim-gpassiugeiof A.the @ifnjector,. end 'the cocks in fthefuel-feed pipe,- snperhezbted-steam pipe, and live-steam pipe,-` bywhich 'to admit to theinjeotor-:passages the y' fuel end superheetedsteam, or Aadmit the ilive steam ajlone, lor witihthesuperhezrteds'team, to i the injector steam-passage teclear thenozzles 7.-The oombinationof the injector lha-ving the inner and outer'tubesor'concentric steaim j und fuel passages, the fuel-feed pipe, -amdthe@ pipe for superhcntedstemn, connected, 'respectlively., with thefuelamd steam ipassegesjofthe injector, fthe pipe `for li\-*efsteasmconfneetedfboth with the fuel-feed pipe land -ithe'sirperheztted-gsteam-pipe, imd the series `of Jcocks @by which to regulateor shutoffLth'efsuppily:of ffuel, -snperheztted steam, vand live steann, `andserving 1 :also fo Idirectthc'livefsteztmtothe fuel-passage f fof 'theinjector by Weyfof the fuel-feed pipe,1 :nid -to the injectorsteafmiparssageby wey fg 'the super-heated steam pipe, rthese imembersbeing and operating substantially as Aherein-g :before set forth.

S. Thecombinution,substantially es -herein-Ibe'forefsetforth,of-thefuel-reservoir, fthe steamypipe therein, theAfuel-feed :pipe leading.; to -the injector, theconnecting-stea-ln-pipecommunieating with the reservoir steem-pipe-andfuel- `feed pipe, and the 5cocks `to cause thefsteem to pass vfrom ithe*reservoir steam-pipe lby Weyof the `connecting-pipe 'Ito lthefeed-pipe, to volea-r Iit-or-to soften the fuel, as described.

9. The combination, substantially as herein- `before set-forth-,ofthe-fuel-reservoir, its-steampipe, the fuel-feed ipipe, its coclrswa,the'connecting steam-pipe communicating with ythe Areservoir vsteam-pipeand with the fuel -feed :pipe between its cocks, and thefcock-d in seidi connecting-pipe, for the .purposedescribed l0. The combination Aof thefuel-reservoir, the fuelfeed pipe leading from the lreservoir to-theinjector, the reservoir steam-pipe, the connecting steam -pipe leztdingtherefrom to the fuel-feed pipe, the superheeted-steem pipe, theysteam-:pipe connecting it with the :pi-pe which-communioates with theYreservoir steampipe and fuel-feed ;pipe,iend the-cocks in the severalpipes, these members being-andoperating; substantially as hereinbeforeset forth.

In testimony whereof I have-hereunto subscribed my name.

vJOHN ROGERS. Witnesses:

F. HOFFMAN, T. OGDEN.

